Bobbin or spool support for textile apparatus.



.I. SHARPE & W. C. GILL.

BOBBIN 0R SPOOL SUPPORT FOR TEXTILE APPARATUS.

APPLICATION FILED APR- 3,1915.

Patented May 16, 1916.

THB COLUMBIA PLANOGRAPH 110., WASHINGTON, D.'C-'

UNITED STATES PATENT oEEroE.

JOHN SHARPE AND WILLIAM C. GILL OF JOHNSTON, RHODE ISLAND.

BOBBIN OR SPOOL SUPPORT FOR TEXTILE APPARATUS.

Specification of Letters Patent.

Patented May 16, 1916.

Application filed April 3, 1915. Serial No. 19,038.

Textile Apparatus, of which the following is a specification.

Our inventlon relates to supply-spindles for use on splnmng-frames or slmllar textile-apparatus and consists particularly of an improved shell or holder for rotatably supporting the supply-spool or bobbin on the dead-spindle.

The object of our improvement is to provide a non-frictionalstep-bearing between the spindle and the bobbin-holder or shell whereby the supply-spool or bobbin can be rotated on its axis with less resistance to its turning movement so that the yarn or thread will be delivered therefrom more freely and evenly with less danger of straining or breaking the ends.

Our invention is fully described in the following specification, illustrated by the accompanying drawings, in which like reference characters designate like parts.

In the drawings :Figure 1 is an elevation of our improved bobbin-support or spool-holder showing the spool applied thereto; and Fig. 2, a sectional view'of the spool-holder or shell taken longitudinally of its axis to illustrate our improved stepbearing as applied thereto.

It is the usual practice with spinningand twisting-frames to take ofi' the supplyyarns from a series of bobbins or spools arranged to rotate on dead-spindles mounted on the spool-board at the top of the machine. Considerable difiiculty has heretofore been experienced in getting the spools or bobbins to rotate freely and evenly to deliver the yarns at a high rate of speed and our present improvement is designed to overcome the defects of the devices now in use. In the hot, dry months of summer when the air lacks humidity the yarns are more brittle and liable to break and unless the supply-spools are arranged to deliver their ends without undue resistance the frames cannot be run at high speed and hence production cannot be kept up to the maximum. It is a well known fact that where the yarns are continually breaking down so that frequent piecing up is required, an operator cannot tend as many frames so that the cost of spinning or twisting is also increased in this way. Our present improvement contemplates the avoidance of these difiiculties by providing for a free and easy rotation of the supplyspools or bobbins so that the yarn can be drawn off therefrom at a high rate of speed wlthout straining or breaking the ends. Our improvement is preferably embodied in a structure as next described.

Referring to the drawings, S designates the usual dead-spindle for the supply-spool and generally a plurality of these are arranged inseries projecting from the top of the spool-board or frameF into which they are screwed or otherwise fastened by means of their threaded ends 8. In most cases it has been the practice to mount the supplybobbln or spool B to rotate directly on the spindle S, but in some instances a separate holder or shell A is used for this purpose. The shell A is usually constructed of Wood to render it light and inexpensive to manufacture and is preferably formed with a shank a, bored at a? to receive the spindle S while allowing a generous clearance around its sides. At one end the shell is formed with an enlarged head or flange a against which the end of the spool B rests to hold the latter in position thereon as shown in Fig. 1.

It has heretofore been the practice to allow the end of the bore a in the shell A to seat against the end of the spindle S to provide a step-bearing therebetween. With this arrangement the end of the bore in the shell takes the thrust of the weight of the spool and its supply of yarn and considerable friction is created which tends to prevent a free rotation of the shell about the spindle.

It will be recognized that a wood-to-steel contact does not give an ideal form of bearing adapted for high-speed rotation of one of the parts. The wood is liable to swell and contract under difi'erent conditions of temperature and considerable friction will be generated even under the best possible conditions. To cure this defect it is now our purpose to provide a metal-to-metal bearing between the spindle and the shell A, and with this end in view we have devised the simple and ingenious construction as next described: Referring to Fig. 2, which is a longitudinal sectional view of our improved shell or spool-holder, we now propose to insert in the end of the bore a a hardened plug P, preferably constructed of steel and formed with its lower end slightly conoidal or pointed as shown at p. The end of the point p is adapted to bear on the top of the slightly rounded end of the spindle S, and in this way a practically frictionless bearing is provided by the two reduced bearing surfaces. The plug P may be applied to position in the shell A by forcing it into a re duced counterbore a? at the end of the main bore a and it will thus be held firmly in position against accidental displacement. A simpler and less expensive method of securing the plug in position, and one which we have found quite as practicable, is to bore theshell of the same diameter clear to its end and to then apply shellac, glue or varnish to the bottom of the bore after which the plug may be pushed into place to be held by the shellac or other cement after the latter has set. By this means we efiect a remarkably simple and eflicient structure for the purpose intended which can be manufactured at very slight cost and which is practically indestructible in use or through mistreatment.

e are aware that it is not broadly new to employ shells or holders for supporting spools or bobbins to rotate about a deadspindle; and we are also aware that it is not new in the art to provide a spoolor bobbin-holder with a pointed end-bearing adapted to be stepped on the end of an up right spindle.

The novelty of our present improvement resides solely in providing a metal-to-metal step-bearing for the wooden shell or holder of the form described, and what we claim for our invention is the simple and ingenious manner of constructing the device for this purpose.

7e claim 1. In a rotatable bobbinor spool-su port for dead-spindles, the combination wit the metal spindle of a tubular shell constructed of wood or other non-metallic material and bored throughout a portion of its length only to leave the end of the bore closed, of a cylindrical plug of hardened metal forced into the bore to seat it against the closed end thereof and formed with a conoidal point adapted to bear on the end of the spindle to provide a metal-to-metal step-bearing between the spindle and the shell.

2. In a rotatable bobbinor spool-holder for dead-spindles, the combination with a tubular shell constructed of wood or other non-metallic material and having an en largement at one end for holding the spool against downward displacement thereon, said shell bored throughout a portion of its length only to leave the end of the bore closed, of a cylindrical plug of hardened metal driven into the bore against the closed end thereof and cemented in place, said plug formed with a conoidal point adapted to seat against the end of the spindle to provide a metal-to-metal step-bearing between the spindle and the shell.

In testimony whereof we afiix our signatures in presence of two Witnesses.

JOHN SHARPE. WILLIAM G. GILL. Vitnesses STERRY K. LUTHER, EVA L. PIPE.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Paton", Washington, D. G. 

